DNS names consist of labels, but outside of length limits, DNS
itself permits any content within the labels. Some records require
labels to conform to hostname limitations (which is what we implemented
before), but not all.
Fixes#2024.
Signed-off-by: David Anderson <danderson@tailscale.com>
Instead of testing all the VMs at once when they are all ready, this
patch changes the testing logic so that the vms are tested as soon as
they register with testcontrol. Also limit the amount of VM ram used at
once with the `-ram-limit` flag. That uses a semaphore to guard resource
use.
Also document CentOS' sins.
Updates #1988
Signed-off-by: Christine Dodrill <xe@tailscale.com>
The resulting empty Prefs had AllowSingleHosts=false and
Routeall=false, so that on iOS if you did these steps:
- Login and leave running
- Terminate the frontend
- Restart the frontend (fast path restart, missing prefs)
- Set WantRunning=false
- Set WantRunning=true
...then you would have Tailscale running, but with no routes. You would
also accidentally disable the ExitNodeID/IP prefs (symptom: the current
exit node setting didn't appear in the UI), but since nothing
else worked either, you probably didn't notice.
The fix was easy enough. It turns out we already knew about the
problem, so this also fixes one of the BUG entries in state_test.
Fixes: #1918 (BUG-1) and some as-yet-unreported bugs with exit nodes.
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
Previously, there was no server round trip required to log out, so when
you asked ipnlocal to Logout(), it could clear the netmap immediately
and switch to NeedsLogin state.
In v1.8, we added a true Logout operation. ipn.Logout() would trigger
an async cc.StartLogout() and *also* immediately switch to NeedsLogin.
Unfortunately, some frontends would see NeedsLogin and immediately
trigger a new StartInteractiveLogin() operation, before the
controlclient auth state machine actually acted on the Logout command,
thus accidentally invalidating the entire logout operation, retaining
the netmap, and violating the user's expectations.
Instead, add a new LogoutFinished signal from controlclient
(paralleling LoginFinished) and, upon starting a logout, don't update
the ipn state machine until it's received.
Updates: #1918 (BUG-2)
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
If you set `-distro-regex` to match a subset of distros, only those
distros will be tested. Ex:
$ go test -run-vm-tests -distro-regex='opensuse'
Signed-off-by: Christine Dodrill <xe@tailscale.com>
Don't try to do heuristics on the name. Use the net/interfaces package
which we already have to do this sort of stuff.
Fixes#2011
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Instead of pulling packages from pkgs.tailscale.com, we should use the
tailscale binaries that are local to this git commit. This exposes a bit
of the integration testing stack in order to copy the binaries
correctly.
This commit also bumps our version of github.com/pkg/sftp to the latest
commit.
If you run into trouble with yaml, be sure to check out the
commented-out alpine linux image complete with instructions on how to
use it.
Updates #1988
Signed-off-by: Christine Dodrill <xe@tailscale.com>
netaddr allocated at the time this was written. No longer.
name old time/op new time/op delta
TailscaleServiceAddr-4 5.46ns ± 4% 1.83ns ± 3% -66.52% (p=0.008 n=5+5)
A bunch of the others can probably be simplified too, but this
was the only one with just an IP and not an IPPrefix.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Previously we spewed a lot of output to stdout and stderr, even when
`-v` wasn't set. This is sub-optimal for various reasons. This patch
shunts that output to test logs so it only shows up when `-v` is set.
Updates #1988
Signed-off-by: Christine Dodrill <xe@tailscale.com>
The cyolosecurity fork of certstore did not update its module name and
thus can only be used with a replace directive. This interferes with
installing using `go install` so I created a tailscale fork with an
updated module name.
Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>
Instead of relying on a libvirtd bridge address that you probably won't
have on your system.
Updates #1988
Signed-off-by: Christine Dodrill <xe@tailscale.com>
On clean installs we didn't set use iptables, but during upgrades it
looks like we could use old prefs that directed us to go into the iptables
paths that might fail on Synology.
Updates #1995Fixestailscale/tailscale-synology#57 (I think)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This will spin up a few vms and then try and make them connect to a
testcontrol server.
Updates #1988
Signed-off-by: Christine Dodrill <xe@tailscale.com>
When tailscaled starts up, these lines run:
func run() error {
// ...
pol := logpolicy.New("tailnode.log.tailscale.io")
pol.SetVerbosityLevel(args.verbose)
// ...
}
If there are old log entries present, they immediate start getting uploaded. This races with the call to pol.SetVerbosityLevel.
This manifested itself as a test failure in tailscale.com/tstest/integration
when run with -race:
WARNING: DATA RACE
Read at 0x00c0001bc970 by goroutine 24:
tailscale.com/logtail.(*Logger).Write()
/Users/josh/t/corp/oss/logtail/logtail.go:517 +0x27c
log.(*Logger).Output()
/Users/josh/go/ts/src/log/log.go:184 +0x2b8
log.Printf()
/Users/josh/go/ts/src/log/log.go:323 +0x94
tailscale.com/logpolicy.newLogtailTransport.func1()
/Users/josh/t/corp/oss/logpolicy/logpolicy.go:509 +0x36c
net/http.(*Transport).dial()
/Users/josh/go/ts/src/net/http/transport.go:1168 +0x238
net/http.(*Transport).dialConn()
/Users/josh/go/ts/src/net/http/transport.go:1606 +0x21d0
net/http.(*Transport).dialConnFor()
/Users/josh/go/ts/src/net/http/transport.go:1448 +0xe4
Previous write at 0x00c0001bc970 by main goroutine:
tailscale.com/logtail.(*Logger).SetVerbosityLevel()
/Users/josh/t/corp/oss/logtail/logtail.go:131 +0x98
tailscale.com/logpolicy.(*Policy).SetVerbosityLevel()
/Users/josh/t/corp/oss/logpolicy/logpolicy.go:463 +0x60
main.run()
/Users/josh/t/corp/oss/cmd/tailscaled/tailscaled.go:178 +0x50
main.main()
/Users/josh/t/corp/oss/cmd/tailscaled/tailscaled.go:163 +0x71c
Goroutine 24 (running) created at:
net/http.(*Transport).queueForDial()
/Users/josh/go/ts/src/net/http/transport.go:1417 +0x4d8
net/http.(*Transport).getConn()
/Users/josh/go/ts/src/net/http/transport.go:1371 +0x5b8
net/http.(*Transport).roundTrip()
/Users/josh/go/ts/src/net/http/transport.go:585 +0x7f4
net/http.(*Transport).RoundTrip()
/Users/josh/go/ts/src/net/http/roundtrip.go:17 +0x30
net/http.send()
/Users/josh/go/ts/src/net/http/client.go:251 +0x4f0
net/http.(*Client).send()
/Users/josh/go/ts/src/net/http/client.go:175 +0x148
net/http.(*Client).do()
/Users/josh/go/ts/src/net/http/client.go:717 +0x1d0
net/http.(*Client).Do()
/Users/josh/go/ts/src/net/http/client.go:585 +0x358
tailscale.com/logtail.(*Logger).upload()
/Users/josh/t/corp/oss/logtail/logtail.go:367 +0x334
tailscale.com/logtail.(*Logger).uploading()
/Users/josh/t/corp/oss/logtail/logtail.go:289 +0xec
Rather than complicate the logpolicy API,
allow the verbosity to be adjusted concurrently.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Pull in the latest version of wireguard-windows.
Switch to upstream wireguard-go.
This requires reverting all of our import paths.
Unfortunately, this has to happen at the same time.
The wireguard-go change is very low risk,
as that commit matches our fork almost exactly.
(The only changes are import paths, CI files, and a go.mod entry.)
So if there are issues as a result of this commit,
the first place to look is wireguard-windows changes.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
We repeat many peers each time we call SetPeers.
Instead of constructing strings for them from scratch every time,
keep strings alive across iterations.
name old time/op new time/op delta
SetPeers-8 3.58µs ± 1% 2.41µs ± 1% -32.60% (p=0.000 n=9+10)
name old alloc/op new alloc/op delta
SetPeers-8 2.53kB ± 0% 1.30kB ± 0% -48.73% (p=0.000 n=10+10)
name old allocs/op new allocs/op delta
SetPeers-8 99.0 ± 0% 16.0 ± 0% -83.84% (p=0.000 n=10+10)
We could reduce alloc/op 12% and allocs/op 23% if strs had
type map[string]strCache instead of map[string]*strCache,
but that wipes out the execution time impact.
Given that re-use is the most common scenario, let's optimize for it.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
e66d4e4c81 added AppendTo methods
to some key types. Their marshaled form is longer than 64 bytes.
name old time/op new time/op delta
Hash-8 15.5µs ± 1% 14.8µs ± 1% -4.17% (p=0.000 n=9+9)
name old alloc/op new alloc/op delta
Hash-8 1.18kB ± 0% 0.47kB ± 0% -59.87% (p=0.000 n=10+10)
name old allocs/op new allocs/op delta
Hash-8 12.0 ± 0% 6.0 ± 0% -50.00% (p=0.000 n=10+10)
This is still a bit worse than explicitly handling the types,
but much nicer.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Add MarshalText-like appending variants. Like:
https://pkg.go.dev/inet.af/netaddr#IP.AppendTo
To be used by @josharian's pending deephash optimizations.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
All netaddr types that we are concerned with now implement AppendTo.
Use the AppendTo method if available, and remove all references to netaddr.
This is slower but cleaner, and more readily re-usable by others.
name old time/op new time/op delta
Hash-8 12.6µs ± 0% 14.8µs ± 1% +18.05% (p=0.000 n=8+10)
HashMapAcyclic-8 21.4µs ± 1% 21.9µs ± 1% +2.39% (p=0.000 n=10+9)
name old alloc/op new alloc/op delta
Hash-8 408B ± 0% 408B ± 0% ~ (p=1.000 n=10+10)
HashMapAcyclic-8 1.00B ± 0% 1.00B ± 0% ~ (all equal)
name old allocs/op new allocs/op delta
Hash-8 6.00 ± 0% 6.00 ± 0% ~ (all equal)
HashMapAcyclic-8 0.00 0.00 ~ (all equal)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
These exist so we can use the optimized MapIter APIs
while still working with released versions of Go.
They're pretty simple, but some docs won't hurt.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Reduce to just a single external endpoint.
Convert from a variadic number of interfaces to a slice there.
name old time/op new time/op delta
Hash-8 14.4µs ± 0% 14.0µs ± 1% -3.08% (p=0.000 n=9+9)
name old alloc/op new alloc/op delta
Hash-8 873B ± 0% 793B ± 0% -9.16% (p=0.000 n=9+6)
name old allocs/op new allocs/op delta
Hash-8 18.0 ± 0% 14.0 ± 0% -22.22% (p=0.000 n=10+10)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Slightly slower, but lots less garbage.
We will recover the speed lost in a follow-up commit.
name old time/op new time/op delta
Hash-8 13.5µs ± 1% 14.3µs ± 0% +5.84% (p=0.000 n=10+9)
name old alloc/op new alloc/op delta
Hash-8 1.46kB ± 0% 0.87kB ± 0% -40.10% (p=0.000 n=7+10)
name old allocs/op new allocs/op delta
Hash-8 43.0 ± 0% 18.0 ± 0% -58.14% (p=0.000 n=10+10)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This requires changes to the Go toolchain.
The changes are upstream at https://golang.org/cl/320929.
They haven't been pulled into our fork yet.
No need to allocate new iteration scratch values for every map.
name old time/op new time/op delta
Hash-8 13.6µs ± 0% 13.5µs ± 0% -1.01% (p=0.008 n=5+5)
HashMapAcyclic-8 21.2µs ± 1% 21.1µs ± 2% ~ (p=0.310 n=5+5)
name old alloc/op new alloc/op delta
Hash-8 1.58kB ± 0% 1.46kB ± 0% -7.60% (p=0.008 n=5+5)
HashMapAcyclic-8 152B ± 0% 128B ± 0% -15.79% (p=0.008 n=5+5)
name old allocs/op new allocs/op delta
Hash-8 49.0 ± 0% 43.0 ± 0% -12.24% (p=0.008 n=5+5)
HashMapAcyclic-8 4.00 ± 0% 2.00 ± 0% -50.00% (p=0.008 n=5+5)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
To get the benefit of this optimization requires help from the Go toolchain.
The changes are upstream at https://golang.org/cl/320929,
and have been pulled into the Tailscale fork at
728ecc58fd.
It also requires building with the build tag tailscale_go.
name old time/op new time/op delta
Hash-8 14.0µs ± 0% 13.6µs ± 0% -2.88% (p=0.008 n=5+5)
HashMapAcyclic-8 24.3µs ± 1% 21.2µs ± 1% -12.47% (p=0.008 n=5+5)
name old alloc/op new alloc/op delta
Hash-8 2.16kB ± 0% 1.58kB ± 0% -27.01% (p=0.008 n=5+5)
HashMapAcyclic-8 2.53kB ± 0% 0.15kB ± 0% -93.99% (p=0.008 n=5+5)
name old allocs/op new allocs/op delta
Hash-8 77.0 ± 0% 49.0 ± 0% -36.36% (p=0.008 n=5+5)
HashMapAcyclic-8 202 ± 0% 4 ± 0% -98.02% (p=0.008 n=5+5)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
setkey
The acyclic map code interacts badly with netaddr.IPs.
One of the netaddr.IP fields is an *intern.Value,
and we use a few sentinel values.
Those sentinel values make many of the netaddr data structures appear cyclic.
One option would be to replace the cycle-detection code with
a Floyd-Warshall style algorithm. The downside is that this will take
longer to detect cycles, particularly if the cycle is long.
This problem is exacerbated by the fact that the acyclic cycle detection
code shares a single visited map for the entire data structure,
not just the subsection of the data structure localized to the map.
Unfortunately, the extra allocations and work (and code) to use per-map
visited maps make this option not viable.
Instead, continue to special-case netaddr data types.
name old time/op new time/op delta
Hash-8 22.4µs ± 0% 14.0µs ± 0% -37.59% (p=0.008 n=5+5)
HashMapAcyclic-8 23.8µs ± 0% 24.3µs ± 1% +1.75% (p=0.008 n=5+5)
name old alloc/op new alloc/op delta
Hash-8 2.49kB ± 0% 2.16kB ± 0% ~ (p=0.079 n=4+5)
HashMapAcyclic-8 2.53kB ± 0% 2.53kB ± 0% ~ (all equal)
name old allocs/op new allocs/op delta
Hash-8 86.0 ± 0% 77.0 ± 0% -10.47% (p=0.008 n=5+5)
HashMapAcyclic-8 202 ± 0% 202 ± 0% ~ (all equal)
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Hash and xor each entry instead, then write final xor'ed result.
name old time/op new time/op delta
Hash-4 33.6µs ± 4% 34.6µs ± 3% +3.03% (p=0.013 n=10+9)
name old alloc/op new alloc/op delta
Hash-4 1.86kB ± 0% 1.77kB ± 0% -5.10% (p=0.000 n=10+9)
name old allocs/op new allocs/op delta
Hash-4 51.0 ± 0% 49.0 ± 0% -3.92% (p=0.000 n=10+10)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
At the start of a dev cycle we'll upgrade all dependencies.
Done with:
$ for Dep in $(cat go.mod | perl -ne '/(\S+) v/ and print "$1\n"'); do go get $Dep@upgrade; done
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Our wireguard-go fork used different values from upstream for
package device's memory limits on iOS.
This was the last blocker to removing our fork.
These values are now vars rather than consts for iOS.
c27ff9b9f6
Adjust them on startup to our preferred values.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Typical maps in production are considerably longer.
This helps benchmarks more accurately reflect the costs per key
vs the costs per map in deephash.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
